diff --git a/DDG4/examples/readHEPMC.py b/DDG4/examples/readHEPMC.py
index 41b43ec3a09b97c40d3d427bf08d62376e46427a..98728e9f04b695b1519ceae01b7ffcca712e7a2a 100644
--- a/DDG4/examples/readHEPMC.py
+++ b/DDG4/examples/readHEPMC.py
@@ -16,17 +16,17 @@ def run(input_file):
   description = kernel.detectorDescription()
   gen = DDG4.GeneratorAction(kernel,"Geant4InputAction/Input")
   kernel.generatorAction().adopt(gen)
-  gen.Input = "Geant4EventReaderHepMC|/home/frankm/SW/data/hepmc_geant4.dat"
-  gen.Input = "Geant4EventReaderHepMC|/home/frankm/SW/data/"
   gen.Input = "Geant4EventReaderHepMC|"+input_file
   gen.OutputLevel = Output.DEBUG
   gen.HaveAbort = False
   prim_vtx = DDG4.std_vector('dd4hep::sim::Geant4Vertex*')()
   parts = gen.new_particles()
   ret = 1
+  evtid=0
   while ret:
     try:
-      ret = gen.readParticles(0,prim_vtx,parts)
+      ret = gen.readParticles(evtid,prim_vtx,parts)
+      evtid = evtid + 1
     except Exception,X:
       logging.info( '\nException: readParticles: %s',str(X))
       ret = None
diff --git a/DDG4/src/Geant4Action.cpp b/DDG4/src/Geant4Action.cpp
index 090435b7f3117f0482e6b4df624186293848d15a..5f0195c43dcd528368a6acf93f63c6d6990e2a86 100644
--- a/DDG4/src/Geant4Action.cpp
+++ b/DDG4/src/Geant4Action.cpp
@@ -257,8 +257,8 @@ void Geant4Action::fatal(const char* fmt, ...) const {
 void Geant4Action::except(const char* fmt, ...) const {
   va_list args;
   va_start(args, fmt);
-  dd4hep::printout(dd4hep::FATAL, m_name, fmt, args);
   string err = dd4hep::format(m_name, fmt, args);
+  dd4hep::printout(dd4hep::FATAL, m_name, err.c_str());
   va_end(args);
   throw runtime_error(err);
 }
diff --git a/DDG4/src/Geant4InputAction.cpp b/DDG4/src/Geant4InputAction.cpp
index c607d8d8174ca0f37d5e0fa16a14181cb5b81a4a..ae451357fa329f6258a9aebeae58dc6c8c0c3d8a 100644
--- a/DDG4/src/Geant4InputAction.cpp
+++ b/DDG4/src/Geant4InputAction.cpp
@@ -63,6 +63,7 @@ Geant4EventReader::EventReaderStatus Geant4EventReader::skipEvent()  {
   ++m_currEvent;
   EventReaderStatus sc = readParticles(m_currEvent,vertices,particles);
   for_each(particles.begin(),particles.end(),detail::deleteObject<Particle>);
+  for_each(vertices.begin(),vertices.end(),detail::deleteObject<Vertex>);
   return sc;
 }
 
diff --git a/examples/DDG4/CMakeLists.txt b/examples/DDG4/CMakeLists.txt
index ed1ceb7156a38ad5ba6033d39fc0000625f674c3..1768f62c5408053b6a2d8132f40f2c4726d1e851 100644
--- a/examples/DDG4/CMakeLists.txt
+++ b/examples/DDG4/CMakeLists.txt
@@ -16,6 +16,7 @@ dd4hep_configure_output ()
 dd4hep_package ( DDG4 MAJOR 0 MINOR 0 PATCH 1
   USES  [DD4hep REQUIRED COMPONENTS DDCore]
 )
+set(DDG4examples_INSTALL  ${CMAKE_INSTALL_PREFIX}/examples/DDG4)
 #
 #---Geant4 Testsing-----------------------------------------------------------------
 #
@@ -47,7 +48,14 @@ if (DD4HEP_USE_GEANT4)
   dd4hep_add_test_reg( test_DDG4_HepMC_reader
     COMMAND    "${CMAKE_INSTALL_PREFIX}/bin/run_test_DDG4.sh"
     EXEC_ARGS  python ${DD4hep_DIR}/examples/DDG4/examples/readHEPMC.py
-                      ${CMAKE_INSTALL_PREFIX}/examples/DDG4/data/hepmc_geant4.dat
+                      ${DDG4examples_INSTALL}/data/hepmc_geant4.dat
     REQUIRES   DDG4 Geant4
-    REGEX_PASS "EventReaderHepMC::moveToEvent INFO  Current event number: 9")
+    REGEX_PASS "Geant4InputAction\\[Input\\]: Event 10 Error when moving to event -  EOF")
+  # Test HepMC input reader
+  dd4hep_add_test_reg( test_DDG4_HepMC_reader_minbias
+    COMMAND    "${CMAKE_INSTALL_PREFIX}/bin/run_test_DDG4.sh"
+    EXEC_ARGS  python ${DD4hep_DIR}/examples/DDG4/examples/readHEPMC.py
+                      ${DDG4examples_INSTALL}/data/LHCb_MinBias_HepMC.txt
+    REQUIRES   DDG4 Geant4
+    REGEX_PASS "Geant4InputAction\\[Input\\]: Event 27 Error when moving to event -  EOF")
 endif()